Loss of gas mileage
#26
#27
#28
Originally Posted by Dave and Julie
The PCM will adjust fuel trim to "optimal" almost instantly. It is constantly adjusting it based on the information it receives from various sensors. We're talking seconds here so that wasn't a factor in your economy.
One of the OBD-II codes you can get (which will light your CEL) is one for LTFT out of range. This happens when you have a major problem in calibration, fuel pressure, or sensor malfuction.
As long as the O2 sensor (the first one after the engine) is in good shape, your ratio will not vary much. If it did, you'd get a check engine light.
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2003stealthedge
General Ford Ranger Discussion
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09-03-2005 01:50 PM